Mixer-blade.



C. OFFENHAUSER.`

' MIXER BLADE.

APPLICATION FILED ocT. 3. Isls.

Patented Nov. 27, 1917;

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INVENTOR ATTORN EVS inifn- MIXER-BLADE.

retenes;

specification of Letters Patent.

rammed Nov. er, ieri..

reputation met october e, 191e. serial No. 123,493.

To all whom t may concern.

Beit known'that I, )Hnis'rornnn OFFEN- HAUsnR, a citizen of thev United States, re-

siding inthe cityand county'of Philadel`-` My present invention comprehendsia nove u construction and arrangementA of a mixer bladeV1 wherein novel mechanism 7 is provided to effect Vthe "adj ustmenti of thelminer arms. 1

It further consists ofa novel construction of a casing, a-1iovelconstruction of mixer blades, and novel means toeifectthe'adjustmentoftsaid blades solthat they caribe-expanded or contracted in order to" vary` the' width'of the patlrthrough` which they travel,

VIt furtherv consists of a novel' construction of a sectional casingan'd novel meansfor locking the partsgtogetherin suchamanner that` the sect-ionsofthe casing canr'be readily assembled orftaken apart wheneverv desired.

Other novel features of' construction and advantage will=` hereinafter more clearly appear in thedetailedr description of myinfy vention.'

For :the purpose of 'illustrating my invention, I have shown: inthe accompanying drawingA ai typical l embodiment of fit which is at present preferredi by me and whichin practice has been found-` to give satisfactory andreliable results, butA it is of course to'be understood that* thisvv embodiment" istypical onlyo and thatL the various instrumentalities off which my invention consists :can be variouslyarrangedand organized and that my invention yis not therefore limited to `#the prei cisef arrangement and; organization y of these instrumentalities fas hereinset'forth.

Figure 1 represents'afront elevation of a mixerbla'de embodying my invention.

\ Fig."` 2 i represents a section i on line 2`21iof Fig: 1. v

Fig;- 3i" represents a side 'f elevation on an enlarged scale ofia'portion i of my` device.

Fig. trepresentsa section on'line4-4 of Figt;

Fig; 5j representsa front. elevation off the lowerH4 end i ofE the zmain casing;`

lligf. 6 `represents sidel elevation 1 aL mixer blade infdetached position..` p

liig.l 7" represents in side elevation vthe uppery end ofi the lowerfcasing.

Similar numerals; of preference i indicate corresponding-partslinfthe fiigures.

Referring to the drawings 1 designates the main or lower casing which is provided intermediate its'endswith a longitudinally extending top 2, thereby forming two members which may be1 braced by means of a crossbar 8 secured to such members/by fastening devices 11 of' any "desired or conventional type.

Y The lower end ofthe casing 1 is `preferablyJ flat, as seen in Fig. 2, and of reduced thickness as indicatedJ at," and terminates in a rounded bottom, as at 6, andthe side arms 7, the under faces of which form" a continuation of the curvature' onthe bottom of the casing;

8` designates thex blades, i a plurality `of which `are employedin the `present instance, and each of these blades preferably hast-he same'conformation and consist of a? curved strip'of material 9 having intermediateithe ends an outwardly extendingarm 10, which at their inner extremities are carried by a pivot pin 11', securedV to the lower'end of the casing 1. The lower end of each' blade-has itsunder face curved, as indicated at'12, such under or outerface then extending at a tangent as at 13 and then curving asat 14 toward the upper end of the blade'.

15l designate links one end `of eachof which is pivoted as at" 16 to itsrespective blade 8, and the opposite ends of said links are pivoted at 174 to an adjusting rod18', which isguided in the casing 1 and which at its upper end is provided with anoffset portion l19 which terminates in an J eye 20.'

2l1 designates a pin which extends into the eye 20 and is connected with an adjust# ing rod 22 which-islguided inl a tubular casing or sleever23. The upperV end of the casing l terminates inaU-shaped portion 24, which is slotted as at 25 toregister with the slots 26inI the lower end off the casing 23? so as to provide for the movement of the pin 21 during the adjustment ofthe blades. The lower end=ofthe casing 23 has secured thereto in any desired manner a block 27.

28 designates a removable fastening pin which passes transversely through the Ui shaped portion 24 of the casingfl, through the block 27 and through the lower end of the casing 23 in order to lock' the parts together, and this pin28 is Lprovided with a `deflected arm 29 which is normallylocked in position by means of a keeper 30, which ilo consists of a pin having a bent end, said pin passing through the block 27 and the casing 23, and being received in Vthe slots 31 in the upper end of the casing land opening through the rear portion of the U-shaped upper end 24, as will be best understood by reference to 7 and to Fig. 3. By such means the casing members are detachably connected together.

82 designates a cap nut connected with the upper casing 23 and through which the adjusting rod passes, said adjusting rod having its upper end threaded tcieceive av nut 33 whichis shown in the form of a hand wheel, in order that the longitudinal adjust-` ment of the adjusting rod 22 and thereby of the blades may be effected. The casing members may be rotated in any desired manner, and in order to illustrate a means for accomplishing this result," l have shown the upper .casing 23 as *havingv fixed thereto a gear 3K1 by means of aset screw 35. This gear 311: is inter-geared .in any desired inanner with the driving mechanism for the mixing machine, and since such connection is old and well-known in the art, l have deemed it unnecessarytoy illustrate and describe in detail such connection.

Theoperation of adjusting the blades and of assembling and taking apart the casing will be readily apparent to those skilled in` this art, and is as follows adjusting rods 22 and 18 will be moved in on their fulcrum, as is apparent.

29 in the direction seen in the arrow in Fig. 3, whereupon the, pin 2S can be withdrawn. The offset portion 19 of the adjusting rod 18 will then be removed from the pin 21 by springing said offset portion outwardly and the easing sections can then be taken apart by causing their relative rotation sutliciently to cause the pin 30 to move vout of the curved slot 31, whereupon by relative longitudinal movement of the casing sections, the'lower casing section can be removed. l

It will now be apparent that I have devised a novel and useful construction of a mixer blade, which embodies the features of advantage enumerated as desirable in `the statement of the invention andthe above description, and while I have, in the present instance, shown and described a preferred embodiment thereof which will give in practice satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars with# out departing from the spirit or scope of the invention or sacrificing any of its advantages.

` Having thus described my inventiomwhat 2. A mixer blade, comprisingarotatable'V casing havin@i its bottom ,face-curved, blades consisting of curved members pivoted to said casing to cause their lower portions to travel within acircle formedrby -a 'radius equal tothe radiusforming lthe curvature ofsaid casing bottom face, and an adjusting member guided by Vthecasing and opera# tively connected with said blades' to effect their relativeexpansion or contraction.l

3. A mixer blade,` comprisinga casing, blades having their lower Vends pivoted to said casing, links pivoted to said blades intermediate their ends, a rod guided by said casing and movably connected vwith said links, a second rod connected with said first rod and longitudinally adjustable, and

means to rotate said casing;

- l casing-having its inner end lrounded and VBy the proper actuating of the nut 33, thev having its rear end. forming a U-shape'd exjg tension, blades pivoted to saidcasing, links wardly or outwardly and owing to the pro-jf' vision of the links 15 and their connections'v Withthe blade 8, such blades will be rocked pivotally connected to said blade, a rod longitudinally adjustable in said slot and connected with said links, a'ldriven casing,

Y an adjusting member therein connected with Vlien it is desired to take apart thede-fll vice,it1s simply necessary to turn the armsaid rod, and means to interlock'said casing'.

5. A mixer blade, comprisinga lower casing, mixing members carriedthereby, a blade carried by said lower casingA and' operatively connected with `said mixing members ing having its inner end rounded andihaving its outer end substantially U-shape, anupper casing having its lower end adapted to enter the U-shaped portiony of the lower casing, said U-shaped portion having a slot therethrough, a pin fixed to said upper casing and adapted to entersaid slot, `aisecond pin` adapted to pass through said casing and in# terlock with said first pin,V blades carriedby said lower easing, a rod operatively connectediwith said blades and `guided in said lower casing, a rod longitudinally adjustable in said upper casing and connected `with said rst .rod,.an adjusting screw engaging said second rod and bearing against the upper Casing, and driving means operatively connected with said upper casing.

7. A miXer blade7 comprising a lower casing having its inner end rounded and provided with curved arms, curved blades having` intermediate their ends arms pivoted to said casing, the outer lower face of an arm being curved, then extending at a tangent and then merging into a curved face toward the upper end of a blade, links pivoted to said blades, a rod guided in said lower oasing and pivoted to said links, an upper oasing having its lower end received in said lower casing, and means to look said oasings together.

8. A mixer blade, comprising a supporting` member, blades mounted on opposite sides of said member' to have their lower ends travel inwardlyT of the forward end of said member when such blades are expanded or contracted, each blade having at all times a portion of its outer face substantially flush with the outer face of said member, and means to expand and contract said blades.

9. A mixer blade, comprising a suporting member, blades pivoted at the forward end of said member, each blade having at all times a portion oi' its outer face substantially flush with the outer face of said member, and means to effect the expansion and contraetion of the upper portions of said blades without causing their outer portions to eX- tend longitudinally beyond said member.

CHRISTOPHER OFFENHAUSER.

Witnesses:

H. S. FAIRBANKS, C. D. MCVAY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of @atenta Washington, D. C. 

